Force Relationships

Question 1

Define force-velocity relationships.

Answer 1

Describes the inverse relationship between force production and the velocity of movement.

Question 2

Describe a concentric contraction.

Answer 2

As more force is required the rate of velocity is reduced. As less force is required the rate of velocity is increased.

Question 3

Describe an eccentric contraction.

Answer 3

As more force is required the rate of velocity increases. As less force is required the rate of velocity decreases.

Question 4

Draw a labelled graph illustrating a concentric contraction.

Answer 4

Did you include -
- Y-axis: Force.
- X-axis: Velocity.
- ‘During muscle shortening, max force is achieved during minimum velocity’.

Question 5

Draw a labelled graph illustrating an eccentric contraction.

Answer 5

Did you include -
- Y-axis: Force.
- X-axis: Velocity
- ‘During muscle lengthening max force is achieved during max velocity.’

Question 6

Define the force-length relationship.

Answer 6

Relates directly towards the amount of muscle force that can be produced at a varying muscle length.

Question 7

Describe the 3 situations of the force-length relationship.

Answer 7

1. As the muscle contracts, cross-bridge linkage formation are impaired due to too much overlap of the myosin filaments. (under 100%)
2. At the mid-range or point at a muscle resting length, optimal overlap of myofilaments occurs, therefore maximising cross-bridge attachment.
3. The muscle is stretched beyond its normal resting state. The reduced overlap of myofilaments causes a decrease in the number of available binding sites. (over 100%)

Question 8

Draw a labelled graph illustrating the force-length relationship.

Answer 8

Did you include -
- Y-axis: Force.
- X-axis: Resting muscle length.
- Mid point